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Atomic-layered Au clusters on α-MoC as catalysts for the low-temperature water-gas shift reaction

Yao, Siyu, Zhang, Xiao, Zhou, Wu, Gao, Rui, Xu, Wenqian, Ye, Yifan, Lin, Lili, Wen, Xiaodong, Liu, Ping, Chen, Bingbing, Crumlin, Ethan, Guo, Jinghua, Zuo, Zhijun, Li, Weizhen, Xie, Jinglin, Lu, Li, Kiely, Christopher J., Gu, Lin, Shi, Chuan, Rodriguez, José A. and Ma, Ding 2017. Atomic-layered Au clusters on α-MoC as catalysts for the low-temperature water-gas shift reaction. Science 357 (6349) , pp. 389-393. 10.1126/science.aah4321

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Abstract

The water-gas shift (WGS) reaction (where carbon monoxide plus water yields dihydrogen and carbon dioxide) is an essential process for hydrogen generation and carbon monoxide removal in various energy-related chemical operations. This equilibrium-limited reaction is favored at a low working temperature. Potential application in fuel cells also requires a WGS catalyst to be highly active, stable, and energy-efficient and to match the working temperature of on-site hydrogen generation and consumption units. We synthesized layered gold (Au) clusters on a molybdenum carbide (α-MoC) substrate to create an interfacial catalyst system for the ultralow-temperature WGS reaction. Water was activated over α-MoC at 303 kelvin, whereas carbon monoxide adsorbed on adjacent Au sites was apt to react with surface hydroxyl groups formed from water splitting, leading to a high WGS activity at low temperatures.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: American Association for the Advancement of Science
ISSN: 0036-8075
Date of First Compliant Deposit: 6 October 2017
Date of Acceptance: 9 June 2017
Last Modified: 11 Mar 2020 22:08
URI: http://orca-mwe.cf.ac.uk/id/eprint/105247

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